MCQ Questions Chapter 13 Photosynthesis in Higher Plants Class 11 Biology

Please refer to MCQ Questions Chapter 13 Photosynthesis in Higher Plants Class 11 Biology with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Biology issued for the current academic year. We have provided MCQ Questions for Class 11 Biology for all chapters on our website. Students should learn the objective based questions for Chapter 13 Photosynthesis in Higher Plants in Class 11 Biology provided below to get more marks in exams.

Chapter 13 Photosynthesis in Higher Plants MCQ Questions

Please refer to the following Chapter 13 Photosynthesis in Higher Plants MCQ Questions Class 11 Biology with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 13 Photosynthesis in Higher Plants Class 11 Biology

Question- Which of the following statements (i-iv) regarding “Splitting of water” is/are correct.
(i) It is photolysis of water which provides H+ ions for synthesis of NADPH.
(ii) It provides electrons for photophosphorylation & activation of NADP+.
(iii) O₂ is evolved during this process.
(iv) It replenishes O₂ consumed by living beings and combustion.
(a) One
(b) Two
(c) Three
(d) All

Question- What is PAR range? 
(a) 200 nm – 800 nm
(b) 400 nm – 700 nm
(c) 350 nm – 550 nm
(d) 600 nm – 100 nm

Question- To make 100 molecules of glucose, how many molecules of ATP & NADPH are required?
(a) 1800 and 1200 respectively.
(b) 1200 and 1800 respectively.
(c) 1800 and 600 respectively.
(d) 200 and 600 respectively.

Question- During the light stage of photosynthesis, the photoactivated pigment removes an electron from the hydroxylation derived from the water molecule.
The fate of the free hydroxyl radical is that it
(a) is broken down into oxygen and a free radical of hydrogen.
(b) is used to raise the activation level of chlorophyll by donating a positive charge.
(c) is used to produce adenosine triphosphate from adenosine diphosphate.
(d) reduces carbon dioxide to sugar.

Question- Consider the following statements with respect to photosynthesis and identify the correct statements.
(i) The first carbon dioxide acceptor in C₄ cycle is PGA.
(ii) In C₃ plants, the first stable product of photosynthesis during dark reaction is RuBP.
(iii) Cyclic photophosphorylation results in the formation of ATP.
(iv) Oxygen which is liberated during photosynthesis comes from water.
(a) (i) and (ii)
(b) (i) and (iii)
(c) (iii) and (iv)
(d) (ii) and (iii)

Question- Match the scientests given in column-1 with their work, given in column-II & select the correct answer using the codes given below.
Column-I                                  Column-II
A. Priestley                     I. Determined the action spectrum of chlorophyll
B. Jan Ingenhousz         II. Provided evidence that in green parts of plant glucose
                                            is made & stored as starch
C. Sachs                        III. Plants purify air only in the presence of light
D. Engelmann               IV. Demonstrated that photosynthesis is
                                       essentially a light-dependent reaction
E. Niel                           V. Revealed the essential role of air in the growth of plants
(a) A – V; B – III; C – II; D – I; E – IV
(b) A – V; B – I; C – II; D – III; E – IV
(c) A – V; B – I; C – IV; D – III; E – II
(d) A – V; B – I; C – III; D – IV; E – II

Question- Match the column-1 with column II and choose the correct answer using the codes given below.
Column -I                                  Column -II
A. Emerson effect                    I. C₄ cycle
B. Hill reaction                         II. Photolysis
C. Calvin cycle                         III. C₃ cycle
D. Hatch & Slack cycle            IV. Photosystem I & II
(a) A – I; B – II; C – III; D – IV
(b) A – I; B – III; C – IV; D – I
(c) A – III; B – IV; C – I; D – II
(d) A – IV; B – II; C – III; D – I

Question- In photosynthesis, splitting of water and release of oxygen occurs during 
(a) photolysis
(b) red drop
(c) Pasteur effect
(d) Calvin cycle

Question- Match the parts given in column I with the events given in column II and choose the correct combination from the options given below.
Column-I                                       Column-II
A. Grana of chloroplast              I. Kreb’s cycle
B. Stroma of chloroplast            II. Light reaction
C. Cytoplasm                              III. Dark reaction
D. Mitochondrial matrix             IV. Glycolysis
(a) A – IV; B – III; C – II; D – I
(b) A – I; B – II; C – IV; D – III
(c) A – IV; B – I; C – III; D – II
(d) A – II; B – III; C – IV; D – I

Question- Match column-I with column-II and choose the correct combination from the options given below.
Column -I                                 Column -II
A. Oxygen evolving                 I. Pigments
complex ferric oxalate
B. Proton gradient                  II. High oxygen
concentration
C. Absorb light at                   III. ATP synthesis
specific wavelengths.
D. Photorespiration                IV. Photolysis of water
(a) A – IV; B – III; C – I; D – II
(b) A – IV; B – I; C – III; D – II
(c) A – II; B – I; C – IV; D – III
(d) A – II; B – IV; C – III; D – I

Question- Select the incorrect statement 
(a) C₄ pathway for CO₂ fixation were discovered by Hatch and Slack
(b) CO₂ is essential for photosynthesis
(c) Addition of sodium carbonate in water retards photosynthetic rate in vallisneria
(d) Phloem is the principal pathway for translocation of solutes

Question- Which of the following is incorrectly matched?
(a) Sorghum — Kranz anatomy
(b) PS – II — P700
(c) Photorespiration — C₃ plants
(d) PEP carboxylase — Mesophyll cells

Question- In non-cyclic reactions of photosynthesis, electrons from chlorophyll molecules in photosystem-I are used in the formation of NADPH. What is the source of such electrons?
(a) Light
(b) NADPH
(c) Photosystem-I
(d) Photosystem-II, which splits water molecule

Question- Cooperation of the two photosystems of the chloroplast is required for
(a) ATP synthesis.
(b) reduction of NADP⁺.
(c) enhancement of dark reaction.
(d) generation of protein motive force.

Question- The reactions of Calvin cycle not directly dependent on light, but they usually do not occur at night. Why?
(a) Night is often too cold for these reactions to occur.
(b) CO₂ concentration in night is too high for these reactions to occur.
(c) Plants usually open their stomata at night.
(d) Calvin cycle is dependent on the products of light reaction.

Question- Which one of the following categories of organisms do not evolve oxygen during photosynthesis? 
(a) Red algae
(b) Photosynthetic bacteria
(c) C₄ plants with Kranz anatomy
(d) Blue green algae

Question- Chloroplasts are disrupted and the stroma separated from the lamellae. The isolated stroma will fix CO2 if it is supplied with
(a) O₂
(b) RuBisCO
(c) light
(d) ATP + NADPH

Question- In Kranz anatomy, the bundle sheath cells have
(a) thin walls, many intercellular spaces and no chloroplasts.
(b) thick walls, no intercellular spaces and large number of chloroplasts.
(c) thin walls, no intercullular spaces and several chloroplasts.
(d) thick walls, many intercellular spaces and few chloroplasts.

Question- The pigment molecules responsible for photosynthesis are located in the
(a) cytoplasm of the cell.
(b) matrix of the mitochondria.
(c) thylakoid membrane of the chloroplast.
(d) All of the above

Question- The correct sequence of Calvin cycle is
(a) Decarboxylation → Oxidation → Regeneration
(b) Decarboxylation → Regeneration → Oxidation
(c) Carboxylation → Reduction → Regeneration
(d) Carboxylation → Reduction → Regeneration

Question- Which of the following plant species have highest photosynthetic yield?
(a) Species that perform photorespiration
(b) Species possessing C₃ pathway
(c) Species possessing C₄ pathway
(d) Same for all

Question- Assume the thylakoid membrane within a chloroplast is punctured so that there is no separation between lumen & stroma of thylakoid. Which of these process would be most affected?
(a) the splitting of water
(b) the synthesis of ATP
(c) reduction of NADP+
(d) the flow of electrons from PS – II to PS – I

Question- According to Blackman’s law of limiting factor, at any given time, photosynthesis can be limited by
(a) light only
(b) CO₂ concentration only
(c) both light and CO₂ concentration
(d) either by light or by CO₂

Question- During monsoon, the rice crop of eastern states of India shows lesser yield due to limiting factor of
(a) CO₂
(b) light
(c) temperature
(d) water

Question- Through the use of oxygen-18 (heavy oxygen),scientists have found that the oxygen released during photosynthesis comes from molecules of
(a) carbon dioxide
(b) water
(c) glucose
(d) chlorophyll

Question- Breakdown of water during the photosynthesis molecule leads to release of
(a) electron and proton
(b) electron and oxygen
(c) proton and oxygen
(d) electron, proton and oxygen

Question- Why C₄ plants are special ? Because,
(i) they have a special type of leaf anatomy.
(ii) they tolerate higher temperatures.
(iii) they show a response to high light intensities.
(iv) they lack a process called photorespiration.
(v) they have greater productivity of biomass.
(a) (i) and (ii)
(b) (i), (iii) and (iv)
(c) (i), (ii), (iii) and (iv)
(d) All of these

Question- What will happen if the supply of oxygen is decreased to an illuminated wheat plant?
(a) Its photosynthesis would decrease.
(b) Its respiration process would stop.
(c) All physiological process would stop.
(d) Its photosynthesis would increase.

Question- The electrons that are released by the photolysis of water during non-cyclic photophosphorylation, ultimately end up in
(a) glucose
(b) ATP
(c) H₂O
(d) NADPH

110. How many molecules of RuBP & CO₂ respectively are required for production of 6 molecules of 3-PGA?
(a) 3 and 2
(b) 2 and 3
(c) 3 and 3
(d) 3 and 1

Question- A student sets up an experiment on photosynthesis as follows:
He takes soda water in a glass tumbler and add chlorophyll extracts into the contents and keeps the tumbler exposed to sunlight hoping that he has provided necessary ingredients for photosynthesis to proceed (viz., CO₂, H₂O, chlorophyll and light). What do you think what will happen after, say, a few hours of exposure of light?
(a) Photosynthesis will take place and glucose will be produced.
(b) Photosynthesis will take place and starch will be produced which will turn the mixture turbid.
(c) Photosynthesis will not take place because CO₂ dissolved in soda water escapes into the atmosphere.
(d) Photosynthesis will not take place because intact chloroplasts are needed for the process.

Question- ADP is phosphorylated and NADP is reduced, this happens during.
(a) dark phase of photosynthesis
(b) light phase of photosynthesis
(c) Photorespiration
(d) Calvin cycle

Question- Blackman’s law of limiting factor is applied to 
(a) respiration
(b) transpiration
(c) photorespiration
(d) photosynthesis

Question- Identify the correct statements for ATP synthase.
(i) This enzyme consists of two parts: hydrophobic membrane bound portion called F0 & a portion that sticks out into stroma called F1.
(ii) F0 appears to form a channel across the membrane through which proton can pass.
(iii) The conformational change in the F1 portion of the complex synthesizes ATP.
(iv) The proton motive force that drives the synthesis of ATP is associated with this enzyme.
(a) (i), (ii) and (iii)
(b) (i), (ii) and (iv)
(c) (i) and (iv) only
(d) All of these

Question- The function of water in photosynthesis is to
(a) absorb light energy.
(b) supply electrons in the light dependent reaction.
(c) transport H⁺ ions in the light independent reactions.
(d) provide O₂ for the light-independent reactions.

Question- Which one does not differ between a C₃ and a C₄ plant? 
I. Initial CO₂ acceptor.
II. Extent of photorespiration.
III. Enzyme catalyzing reaction that fixes CO₂.
IV. Presence of Calvin cycle.
V. Leaf anatomy.
(a) I and V
(b) IV
(c) II and III
(d) II

Question- Which of the following is not concern with cyclic photophosphorylation?
(a) Liberation of oxygen.
(b) Synthesis of ATP.
(c) It occurs in certain photosynthetic bacteria.
(d) Electron expelled from P700 return to it after passing through different electron accepto

Question- During light reaction, as electrons move through photosystems, protons are transported across the membrane. This happens because of
(a) the primary acceptor of e– (located towards the outer surface of the membrane) transfers its electron not to an e– carrier but to H carrier.
(b) the primary acceptor of e– transfers only its e– to e– carrier.
(c) the primary acceptor of e– transfers only H+ to the next carrier.
(d) NADP – reductase is present in grana.

Question- Which one of the following event occurs both during cyclic and non-cyclic modes of photophosphorylation?
(a) Involvement of both PS – I and PS – II.
(b) Formation of ATP.
(c) Release of O₂.
(d) Formation of NADPH.

Question- Reduction of NADP+ into NADPH during light reaction occurs in stroma because
(a) NADP reductase enzyme is located on the stroma side of membrane.
(b) PS – I reduces NADP+ to NADPH +H⁺ in the stroma.
(c) The pH of the stroma remains constant.
(d) Both (a) and (b) are correct.

Question- By which of the following complex, proton is pumped to reach ATP synthase, to participate in ATP synthesis.?
(a) Cytochrome b6f
(b) Cytochrome c oxidase
(c) Cytochrome a – a3
(d) Cytochrome bc

Question- Number of carbons in the primary CO₂ fixation products in C₃ plant is
(a) 3
(b) 4
(c) 5
(d) 6

Question- Which of the following does not participate in the process of photosynthesis?
(a) Red algae
(b) Green algae
(c) Brown algae
(d) None of these

Question- Which part of the plant do not perform photosynthesis?
(a) Cactus stem
(b) Guard cell of stomata
(c) Mesophyll cells of leaf
(d) Leaf epidermis

Question- Under water stress, the rate of photosynthesis declines because of
(a) stomatal closure leading to decrease in CO₂ supply
(b) reduced water potential that decreases leaf surface areas for photosynthesis
(c) both (a) and (b)
(d) turgidity of leaf

Question- Accessory pigments
(a) play no role in photosynthesis.
(b) release e– and get oxidized.
(c) transfer of e– to NADP.
(d) allow plants to harvest visible light of wider range wavelengths.

Question- Chlorophyll is suited for the capture of light energy because
(a) certain wavelengths of light raise it to an excited state.
(b) in its excited state chlorophyll gives off electrons.
(c) chlorophyll’s structure allows it to attach to thylakoid membranes.
(d) all of the above

Question- Which of following ratio is correct for the production of one molecule of glucose through 6 rounds of Calvin cycle?
   CO₂     ATP    NADPH₂
(a) 1          2        2
(b) 6        18       12
(c) 6        12       18
(d) 5        6         9

Question- During photosynthesis, electrons are continuously lost from the reaction centre of PSII. By which process these electrons are replaced?
(a) Sunlight
(b) Photolysis of water
(c) Release of oxygen
(d) Redox reaction

Question- In an experiment, the CO₂ available to a C₄ plant was labelled with a radioactive isotope and the amount of radioactivity in the chloroplast was measured. As photosynthesis preceeded, in which of the following molecules did the radioactivity first appear?
(a) Oxaloacetic acid
(b) PEP
(c) Malic acid
(d) RuBP

Question- Which of the following pair is not correctly matched ?
(a) C₃ plant – Maize
(b) C₄ plant – Kranz anatomy
(c) Calvin cycle – PGA
(d) Hatch and Slack pathway – Oxaloacetic acid

Question- In C₄ plants, the first carbon dioxide acceptor is
(a) pyruvate 
(b) phosphoenol pyruvate
(c) ribulose biphosphate
(d) ribulose 5, phosphate

Question- Why, at higher light intensities, gradually photosynthesis rate does not show further increase?
(a) Higher light intensity activate more chlorophylls.
(b) Higher light intensity causes more transpiration.
(c) No need of more sugar formation.
(d) Other factors become limiting.

Question- Hill reaction occurs in 
(a) high altitude plants
(b) total darkness
(c) absence of water
(d) presence of ferricyanide

Question- In C₄ (sugarcane plant) plant,14CO₂ is fixed in malic acid in which the enzyme that fixes CO₂ is
(a) fructose phosphatase
(b) ribulose biphosphate carboxylase
(c) phosphoenol pyruvic acid carboxylase
(d) ribulose phosphate kinase

Question- Photosynthesis is the transformation of
(a) light energy to chemical energy.
(b) chemical energy to light energy.
(c) light energy to kinetic energy.
(d) solar energy to potential energy.

Question- The family in which many plants are C₄ type
(a) Malvaceae
(b) Solanaceae
(c) Crucifereae
(d) Graminae

Question- Light reaction of photosynthesis results in the formation of
(a) O₂
(b) NADPH + H+
(c) ATP
(d) All of these

Question-In the electron transport chain during terminal oxidation, the cytochrome, which donates electrons to O₂ is 
(a) Cytochrome-b
(b) Cyto-C
(c) Cyto-a₃
(d) Cyto-f

Question- In a crop field a weedicide is used to remove weeds in order to increase the yield. But the effect of this weedicide is that, it blocks electron transport from photosystem II to photosystem I. This will result in
(a) enhancement of dark reaction.
(b) failure of ATP synthesis.
(c) lack of reduction of NADP⁺.
(d) both (b) and (c)

Question- Cyclic and non-cyclic flow of e– is used in plants to
(a) meet the ATP demands of Calvin-cycle.
(b) avoid producing excess NADPH + H⁺.
(c) balance ATP and NADPH + H⁺ ratio in chloroplasts.
(d) All of the above

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